<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>按钮悬浮变红</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.10/dist/vue.min.js"></script>
<style type="text/css">
    button:hover {
        background-color: red;
    }
</style>
</head>
<body>
<div id="app">
    <button>教父</button>
    <button>阿甘正传</button>
    <button>楚门的世界</button>
    <button>盗梦空间</button>
</div>
</body>
</html>